Compasses



'A. LYSIAK.

COMPASSES. APPLICATiON FiLED JULY HI 1921.

1,402,509 v Patented Jan. 3, 1922,

v improved drafting instrument inthe nature,

panying drawing and claimed, a

ToaZZ whomiit'mayconcerns f ,Be it kn'ownthat LANTONI LYSIAK,

zen of Poland, residin riat Manchester, inthe county of Essex and'btate ofMas'sachusetts,

have invented certain'flnefwyand usefu1, Im-.;

lowing is a, specification i a This invention relates to certain new and useful improvements in compasses and has vblocks 5, and one ofthe blocks 5 has acurved guide rod 15 fastened thereto, andthis guide f ,rod slidably'extends through an opening'in theother block5 to be engaged by a set screw it 16 [threaded therethrough for maintaining said blocks in anyadjusted relation. Asan 'additionalqor equivalent means for adjustparticular reference to the provision ofan of a multiple compass l a The primary object of the invention is to provide acompass of the abovekind include ing more than two adjust'ably connected marker carrying legs whereby" a pluralityof" circles may be simultaneously made and triangles and rectangles 'convenientlymar'ked Off. 7 M iii 3 i Briefly described, the invention consists generally, in a pair of compasses dlsposed side by side and hingedly connected at thelri upper ends for swinging toward-and away from each other and provided with means for maintaining the same in afdesired relaj ti0n.1

others that will become apparent asytlie nature of the invention is 'better understood, the same consists, in the novel form, combi nation and arrangementof parts hereinafter more fully described, :shown in theaccom- In the drawing forming a part of this specification,and in whichjflike, characters of reference indicate corresponding. parts throughout the several views,

" and Figure. 1 is anedge .elevational view of a,

i V drafting instrumentsconstructed in'alccord 40 i ance with the present; invention,

Figure 2' is a side elevational view thereof, a

Figure 3 is a top plan View of the same.

Referringmore in detail. to theseveral views, the invention embodiesa pairiof c0 mpasses each including a plate or block swan: the upper ends of a pair of legs 6 land 7 hinged thereto as at 8 and 9 respectively for swinging movement toward and away from each other, the leg 6 having-one end or a curved guide rod 10 fastened therein slidably extendingthrough an openlngm the leg 7 so as'to be engagedgbya setscrew;

11 threaded insaid leg Tfor maintaining the legs 6 and 7 alt any desiredposition to which: they may be swung relative to each other j Ofs'aid legs and maintained so adjusted means of a set screw 13. v

to the adjacent side facesrof the plates for ably'simaintainingithe proper spaced relation between the two pairs of comp-asses, thelegs 6, and 7 of one pair ofcompasses'mayhave a curved guide rods; 17 rigidly fastened there a s Q U to" andrespectivelyextending through the legs 6 and 7 of the other pairof compasses v which are provided withfsetscrews 18 adapt od to engagesaid guide rods 17 for maintaining the desired relation between the two o a compasses a, r With the above general obj ect, in View ando passes togetherlso that the plates or blocks 5 arein contiguous relatiomrthe device may be .-emp1oyedintheusual way as a single com-v pass and by swinging said compasses in' spaced relation" as shown in the drawings, v onejof the points 12may beused as apivot soasto scribejthreecircles or twocircles as de-, sired by adjusting the desired remaining points 12 so as "to (contact, with the surface upon which the circlesare tobe drawn, the

various adjustments being obtained in the i usual way by loosening and then tightening the various:setiscrews involved in the operation. By varyingthe relationship between the four legs, andiengaging three of the points with the surface, an impression of g whensaid points are connected by straight linesa triangle will be readily formed of the said points may be made thereon so that desired size, and by performing the same operationwithrespecttojall four points, a ree tangle of the desired, proportions may be readily made. These constitute only'lafe w ofthe manyuses for which the instrument is 4 adapted and] which a will suggest themselves toione skilled in the are c a From the foregoing "description, fit is' be, :lievedthat the construction and operation v as well as. the advantagesof the present inaawa 192% I 'Thezlegs 6 and? are provided with the usual marker p0ints' l2 adjustable 1 longitudinally I-,The twotpairsof compasses are pivotally connected'attheirupper ends so asv to swing toward-and away froln each otheriby means i of e -leaf hingele having its leaves securedy vention will be readily understood and appreciated by those skilled in the art. Minor changes may be made therein without de parting from the spirit and scope of the invention as claimed.

pivotally connecting said head plates to each other whereby swinging of the pairs of compasses away from or toward each other may I be had and the direction of swing of the pairs relative to each other will be at right angles to the direction of movement of the legs. of each pair, and means'to adjustably retain the compasses at any desired position to which they may be swung relative to each other.

2. A drafting instrument comprising two pairs of compasses pivotally connected at their upper ends and disposed side by side,

and means to retain the compasses in any desired adjusted position to which they may be swung relative to each other, said pairs swinging away from each other in a direction at right angles to the direction of swing of their leg members. I I

In testimony whereof I afiiX my signature.

ANTONI LYSIAK. 

